In a data processing system network, apparatus and method are disclosed for coupling two local area networks by means of a wireless link. Typically, two local area network (LAN) systems are coupled by a bridge device, the bridge device receiving signal groups from each LAN system and selectively forwarding the signal groups to the target LAN system. In the presence of the overlapping (or simultaneous) transmission of signal groups applied to the target LAN system, these signal groups must be rea...

A system and method of providing a terminator telecommunications unit with the geographic location of a mobile telecommunications unit, where the terminator unit may then provide directions to the mobile unit in voice format or non-voice data format so the mobile unit can use the directions to arrive at the location of the terminator unit.

A transmission and reception system includes a transmission apparatus 1 and reception apparatuses 21 and 22. The transmission apparatus 1 transmits a storage identifier for identifying a storage medium and data. The reception apparatuses 21 and 22 each include a receiving section for receiving the storage identifier for identifying the storage medium and the data, and a storage control section for storing the data received by the receiving section on the storage medium identified by the storage ...

The invention discloses a control scheme for wireless communications networks, including stations communicating with mobiles in downlink mode. The network includes an elementary load calculator designed to compute the load induced by a given mobile on a server station. The elementary load calculator includes: a first function (PA1) designed to compute a first elementary quantity taking into account the attenuation between the mobile and each nearby station (Lv,m.sub.u) and the limit on the total...

An interface between base band circuitry and RF transceiver circuitry, particularly relating to the Bluetooth standard. The interface has a plurality of connectors (DBus) for controlling the RF transceiver circuitry including providing control information for changing the mode of operation of the transceiver, said modes including a transmit mode and a receive mode; at least first and second further connectors (RFBus) wherein in the transmit mode, one of said first and second connectors supplies ...

An r.f. signal transmission line system in which a plurality of spaced apart A.C. power sources are respectively coupled by power combiners to a plurality of sequential segments of the transmission line for powering a group of spaced apart thru-powered r.f. signal amplifiers in series with each segment. Each power combiner includes a switching circuit for automatically disconnecting the source from the line segment in the event of failure of the source. Associated with stop-powered amplifiers be...

A supervised, interactive alarm reporting system includes a local terminal comprised of a supervised derived channel communicator, and a one-way radio communicator (preferably via the cellular telephone network), which are connected by a control unit which provides for interactive operation of the derived channel unit and the radio transmitter according to alarm conditions which may arise at the premises, and the existing condition of the equipment comprising the local terminal unit. The local t...

An alarm reporting system includes a control unit which services a supervised derived channel communicator, and a one-way radio communicator (preferably via the cellular telephone network), to provide for interactive operation of the derived channel unit and the radio transmitter according to alarm conditions which may arise at the premises, and the existing condition of the equipment comprising the system. The system is capable of communicating with a central monitoring facility, or mobile unit...

A system for interfacing an alarm reporting unit with a cellular radio transceiver so that the data which is produced by the alarm reporting unit is effectively matched to the radio transceiver, irrespective of its initial format, includes circuitry for matching the format of the alarm reporting unit to that of the cellular radio transceiver, and circuitry for matching the format of the cellular radio transceiver to that of the alarm reporting unit, to permit interactive communications which ass...

A modem is equipped with both a conventional telephone line interface for attaching to a wired telephone jack and a special interface for connecting to a cellular telephone. The modem interacts with the cellular telephone in accordance with a special protocol, wherein signals of the protocol are derived directly from the conventional modem signals used to interact with the wired telephone jack. No high voltage signals need pass between the modem and cellular telephone. Substitution of the cellul...